.header {
  width: 100%;
  /* 64px */
  height: 1.706667rem;
  background-color: #fff;
  border-bottom: 1px solid #b2b2b2;
  /* 17px */
  font-size: .453333rem;
  color: #333;
  text-align: center;
  line-height: 1.706667rem;
  font-weight: bold;
  background-image: url('../header.png');
  background-size: cover;
  overflow: hidden;
}